404328538 has 4 divisors (see below), whose sum is σ = 606492810. Its totient is φ = 202164268.

The previous prime is 404328521. The next prime is 404328581. The reversal of 404328538 is 835823404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 366837409 + 37491129 = 19153^2 + 6123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404328497 and 404328506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101082133 + ... + 101082136.

Almost surely, 2^404328538 is an apocalyptic number.

404328538 is a deficient number, since it is larger than the sum of its proper divisors (202164272).

404328538 is a wasteful number, since it uses less digits than its factorization.

404328538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202164271.

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 404328538 is about 20107.9222695931. The cubic root of 404328538 is about 739.4545152138.

The spelling of 404328538 in words is "four hundred four million, three hundred twenty-eight thousand, five hundred thirty-eight".